leuchtenberg



D a 11,1928. LEUCHTENBERG Re. 17,162

PROCESS OF REMOVI NG HYDROGEN SULPHIDE FROM C,OAL 0R WATER GASES Original Filed" July 1925 Inthedrawings,

Reisaued 1 1, 1 928.

UNlTED STATES Re.l7,162 PATENT OFFICE.

wmnnx I. LIUCHTENBIBG, NEW roan, N. Y.

' PBOGEQS Or MOVING HYDROGEN SULPHIDE FROM COAL 03 WATER GASES.

Original No. 1,829,806, dated Kay 17, 1927, Serial No. 14,825, filed July 80, 1925. Application tori-ensue flied November 1, 1988. Serial No. 816,562.

- Although published and patented a great manyt'egears ago, it has been recently incorpora in patents. The revivification of the solution thus formed, has caused some considerable difliculty.

Blowing air, or rather passing the foul solution against a stream of air anddisch'arging the air and hydrogen sulphide liberated by the air from the foul solution into the atmosphere is the only successful means so far discovered. This, however, isobjectionable as the air thus polluted'with H,S is a menace to health and; property and as a consequence, some of the plants operating by this method have had to discontinue their operation under pressure of public opinion, or confine operating to periods ofjavorableaircondition.

- The single figure illustrates diagram -matic form an elevational view of the ap paratus used in this process.

The numeral 1 designates the'foul gas inlet I 3 leading to ascrubberB, while 8 represents'an overhead tank conta mng carbonate Numeral 4 d -a solufion spray. whilelire ts purifiergasoutlet and a 6 and 7 the foul solution pump line. a so ution um ii ioiil iuuon 'thefnl 1 a so ray 0 sousongn mdin -im-iiwu chamber s e e m W n 1 .10.} 11 represents foul entersthe foul gas inlet -1, passintiupw into a vemeI-2 commonly called e scrubber thro alkaline solution from overhe tank 84s downwardanden the'chamber2 .the'spray4, the ed leaves througlh a gas outlet 5 leading toe holder. Theso ution afterha takenupH Sfrom the gas leaves the clmm at 17 and enters as built. is

;' mean'sfor continuous renewal of catalyst.

The 'catal aa'diseharged as9 %'sulphu r in-acolloi alform and h whichan;

bewashedfreefromthe pumped by means of foul solution pump 8 through 9. pi 7 to spray 9 into the purifier 10 where a ow of air pumped by pump 11' takes up the H58. in the solution. The thus actified solution runs through pipe 18 to the revivified solution tank 19, after which it is returned by pump 20 to line 21 to the overhead tank 3.

The air containing the H 8 leaves the chamber 10 through a foul air duct-12 andfenters the purifier 13 at 22.. After passing the oxide, it leaves in a purified condition at 14. In orderto make the process continuous, oxide at a low rate is supplied to theoxide purifier for foul air 13 through a hopp'er 15, which may be termed an inlet, ob tinuously passing downward tobe removed by a worm 23 through opening 16, the wdrm 23 being adapted to remove oxide and sulphur.

This invention relatesto a method where- .by the nuisance above described may be eliminated, and the otherwise useful method employed without danger. to public health an in an economic w y at little expense. The 1 solution after foulin ssubjected to the flow 9 of air'as in the older method andthis air instead of discharging'into the atmosphere is passed throu h a chamber in which astream of substanti y dry discrete particles of iron oxide is tgradually and automatically passed against; e flow of such air, Only a smallquantity of iron oxide isrequired if a very active material such as is as the iron oxide will act as a catalyst in decomposing p s F 0, equals e p F 'lusair alsF O 1us8Sp1usN.. The by tl iis meihodhowever due to the catalytic actlon of the active iron oxide maybeirtte n 0mm S us: us action i iltuialontintiaiigbut iiithe gradual. isonmg 0 sea For this reason there is herewithprovided 1' ma contain as isu'sefulintheart'. Forum Is, duetothis sub-division, item be to advantage to produce insecticides for fruit tree'sglray or v10 for anyother purposes where finely 'vided sul huris advan us. operation or m use this invention provides a process whereby the or gases may bymeans oi an alkali-metal carbonate solution and again be made active by passin the foul solution against a flow of air an the air subsequently throu h or against a stream of substantially dry discrete particles of a catalyst in form of an active condition'of oxide of iron such as al ha-lux.

at I claim is:

1. In a process for removing hydrogen sul- 'top of the-container, and withdrawing fouled or spent oxide at the bottom, and discharging the: purified" air from the container after passing through the newly supplied oxide.

2. In aprocess for removing hydrogen sulphide-from coal or water gases by treating the gases with an alkali carbonate solution' to absorb the hydrogen sulphide, then activating the solution containing the hydrogen sulphide by passing the foul solution counter to a flow of air, the improvement which consists in removing the hydrogensulphide from the air by passing the air through a stream of substantiall dry discrete particles of iron oxide moving in the opposite direction.

3. In a process for removing hydrogen sulplhide from coal or water gases by treating t e to absorb the hydrogen sulphide then activatin the solution containing the hydrogen sul-' phide by passing the foul solution counter to y a flow of air, the improvement whichconsists in purifying, the air by passing'it through a ry discrete parv the solution containin t gases with an alkali carbonate solution stream of substantially dry discrete particles of iron oxide in a suitable container, the iron oxide being continuously fed into the vessel at the top an purified air is discharged at the top of said vessel discharged at the bottom, whereas the air containing the hydrogen sulphide enters the container at the bottom and the 4. Ih 'a process for removing hydrogen sulc phide from coal or water gases by treating the gases with an alkali carbonate solution to absorb the hydrogen sulphide, then activating the solution containing the hydrogen sulphide by passing the foul solution counter to a flowof air, theimprovement which consists in removing hydrogen sulphide from the foulair by passlnglthe air into a vessel and passing it upwar 7 counter to a stream of substantially dry discrete articles of. iron oxide passing continuously ownwardly, and discharging purified air at the top of the column of iron oxide, whereby the air containing the eatest amount of hydrogen sulphide comes in contact with the partially fouled oxide, and the relatively pure air comes in contact with the freshoxide. I v

5. vIn a process for removing hydrogen sulphide from coal or water the gases with an alkali car onate solution to absorb the hydrogen sulpihide, then activating e hydrogen-sulphide by passing-the'foul so ution counter to a How 0 air, the improvement which consists in removin h drogen sulpkhide from'the air prior to its 180 arge into t e atmosphere, by passin said air continuously through a stream of su stantially dry discrete particles of iron oxide passin continuously in a, direction counter to t e air, continuously supplying fresh oxide and, at the same time removing fouled or spent oxide. 7

Intestimony whereof, I afiix my signature.

' LEUCHTENBERG. i

gases by treating 

